The Disney star's family had already explained he suffered from seizures caused by epilepsy and had died in his sleep on July 6. Toxicology tests showed that Boyce tested positive for Levetiracetam, a commonly used anti-seizure medication, but no other drugs were in his system at time of death. The report also stated that the actor had a history of "non-traumatic" epilepsy for three years, and had suffered "several major seizures over the years."

A witness statement included in the report stated that the 20-year-old was last known alive "a little past midnight" on July 6. "Boyce's housemates were leaving later in the day when they decided to check on him," the report read before stating that his roommates found him unresponsive in his bed. After calling 9-1-1, the actor's housemates administered CPR before emergency personnel arrived to the house.